[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.663193] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.222954] random: sshd: uninitialized urandom read (32 bytes read) [ 23.556799] random: sshd: uninitialized urandom read (32 bytes read) [ 24.463207] random: sshd: uninitialized urandom read (32 bytes read) [ 24.613611] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.12' (ECDSA) to the list of known hosts. [ 30.165500] random: sshd: uninitialized urandom read (32 bytes read) 2018/07/19 10:02:21 parsed 1 programs [ 32.029710] random: cc1: uninitialized urandom read (8 bytes read) 2018/07/19 10:02:23 executed programs: 0 [ 33.325782] IPVS: ftp: loaded support on port[0] = 21 [ 33.443992] WARNING: CPU: 1 PID: 4555 at include/net/sock.h:644 smc_unhash_sk+0x357/0x4b0 [ 33.452473] Kernel panic - not syncing: panic_on_warn set ... [ 33.452473] [ 33.459873] CPU: 1 PID: 4555 Comm: syz-executor0 Not tainted 4.18.0-rc5+ #56 [ 33.467060] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.476420] Call Trace: [ 33.479017] dump_stack+0x1c9/0x2b4 [ 33.482642] ? dump_stack_print_info.cold.2+0x52/0x52 [ 33.487830] panic+0x238/0x4e7 [ 33.491018] ? add_taint.cold.5+0x16/0x16 [ 33.495166] ? __warn.cold.8+0x148/0x1ba [ 33.499220] ? __warn.cold.8+0x117/0x1ba [ 33.503271] ? smc_unhash_sk+0x357/0x4b0 [ 33.507320] __warn.cold.8+0x163/0x1ba [ 33.511202] ? smc_unhash_sk+0x357/0x4b0 [ 33.515248] report_bug+0x252/0x2d0 [ 33.518869] do_error_trap+0x1fc/0x4d0 [ 33.522741] ? graph_lock+0x170/0x170 [ 33.526528] ? math_error+0x3e0/0x3e0 [ 33.530319] ? lock_acquire+0x1e4/0x540 [ 33.534282] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.539116] do_invalid_op+0x1b/0x20 [ 33.542822] invalid_op+0x14/0x20 [ 33.546287] RIP: 0010:smc_unhash_sk+0x357/0x4b0 [ 33.551106] Code: 48 8b 45 d0 65 48 33 04 25 28 00 00 00 0f 85 88 00 00 00 48 81 c4 c0 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 c9 52 1a fa <0f> 0b e9 47 ff ff ff 4c 89 ff 48 89 85 28 ff ff ff e8 b3 31 58 fa [ 33.570296] RSP: 0018:ffff8801d909f9f8 EFLAGS: 00010293 [ 33.575647] RAX: ffff8801d8c1e740 RBX: ffff8801d8d2f0c0 RCX: ffffffff8761b7f6 [ 33.582900] RDX: 0000000000000000 RSI: ffffffff8761b8b7 RDI: 0000000000000005 [ 33.590154] RBP: ffff8801d909fae0 R08: ffff8801d8c1e740 R09: ffffed003b1a5e28 [ 33.597410] R10: ffffed003b1a5e28 R11: ffff8801d8d2f143 R12: 1ffff1003b213f43 [ 33.604665] R13: ffff8801d909fab8 R14: ffffffff89937480 R15: ffff8801d8d2f140 [ 33.611946] ? smc_unhash_sk+0x296/0x4b0 [ 33.616004] ? smc_unhash_sk+0x357/0x4b0 [ 33.620072] ? smc_unhash_sk+0x357/0x4b0 [ 33.624133] ? smc_rx_data_available+0x120/0x120 [ 33.628886] ? release_sock+0x1ec/0x2c0 [ 33.632873] ? __local_bh_enable_ip+0x161/0x230 [ 33.637531] ? __release_sock+0x3a0/0x3a0 [ 33.641687] ? smc_release+0x2c9/0x670 [ 33.645575] ? trace_hardirqs_on+0xd/0x10 [ 33.649739] ? __local_bh_enable_ip+0x161/0x230 [ 33.654444] smc_release+0x3cf/0x670 [ 33.658185] __sock_release+0xd7/0x260 [ 33.662079] ? __sock_release+0x260/0x260 [ 33.666230] sock_close+0x19/0x20 [ 33.669672] __fput+0x355/0x8b0 [ 33.672943] ? fput+0x1a0/0x1a0 [ 33.676217] ? _raw_spin_unlock_irq+0x27/0x70 [ 33.680703] ____fput+0x15/0x20 [ 33.683977] task_work_run+0x1ec/0x2a0 [ 33.687858] ? task_work_cancel+0x250/0x250 [ 33.692179] ? exit_to_usermode_loop+0x8c/0x370 [ 33.696844] exit_to_usermode_loop+0x313/0x370 [ 33.701421] ? syscall_slow_exit_work+0x500/0x500 [ 33.706273] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.711815] do_fast_syscall_32+0xcd5/0xfb2 [ 33.716140] ? do_int80_syscall_32+0x890/0x890 [ 33.720733] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 33.725479] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.731014] ? syscall_return_slowpath+0x31d/0x5e0 [ 33.735959] ? sysret32_from_system_call+0x5/0x46 [ 33.740814] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.745646] entry_SYSENTER_compat+0x70/0x7f [ 33.750051] RIP: 0023:0xf7f4fcb9 [ 33.753410] Code: 55 08 8b 88 64 cd ff ff 8b 98 68 cd ff ff 89 c8 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 1c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 33.773556] RSP: 002b:00000000ffa9b30c EFLAGS: 00000246 ORIG_RAX: 0000000000000006 [ 33.781255] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000008150138 [ 33.788530] RDX: 0000000000000004 RSI: 0000000000000001 RDI: 00000000ffa9b9c8 [ 33.795799] RBP: 00000000000003c0 R08: 0000000000000000 R09: 0000000000000000 [ 33.803058] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 33.810341] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 33.818409] Dumping ftrace buffer: [ 33.822086] (ftrace buffer empty) [ 33.825781] Kernel Offset: disabled [ 33.829403] Rebooting in 86400 seconds..